ACCESSABILITY-L14B Contention Based random Access (CBRA) Random Access Contension Free Random Access (CFRA) pmRaAttCbra , pmRaSuccCbra pmRaFailCbraMsg2Disc , pmRaFailCbraMsg1DiscOoc pmRaFailCbraMsg1DiscSched pmRaAttCfra pmRaSuccCfra pmRaFailCfraMsg2Disc pmRaAllocCfra pmRaUnassignedCfraFalse pmRaUnassignedCfraSum pmRaFailCfraMsg1DiscOoc pmRaFailCfraMsg1DiscSched rachRootSequence , cellRange qRxLevMin , preambleInitialReceivedTargetPower powerRampingStep (Hardcoded) , preambleTransMax (Hardcoded) numberOfRA-Preambles (Hardcoded) rachRootSequence , cellRange qRxLevMin , preambleInitialReceivedTargetPower powerRampingStep (Hardcoded) , preambleTransMax (Hardcoded) numberOfRA-Preambles (Hardcoded) MP load Improve RF conditions (by parameters or physical optimization (tilt/azimuth/antenna height)) Check RSI planning (ex. For 15km cell range, diff of 10 between 2 neighbours) Tune RACH related parameters , also check symptoms for sleeping cell (mentioned below) Improve RF conditions (by parameters or physical optimization (tilt/azimuth/antenna height)) Check RSI planning (ex. For 15km cell range, diff of 10 between 2 neighbours) Tune RACH related parameters , also check symptoms for sleeping cell (mentioned below) pmRrcConnEstabFailHighLoad (MP load control) pmRrcConnEstabFailOverload (procedure latency supervision) pmActiveUeDlSum pmActiveUeDlSectorCarrierDistr pmActiveUeDlMax pmActiveUeDlSumQci pmActiveUeUlSum pmActiveUeUlMax pmActiveUeUlSectorCarrierDistr pmActiveUeUlSumLcg Capacity cause pmRrcConnEstabFailActiveUserLicenseExceeded License Poor DL SINR (CQI) pmRrcConnEstabFailFailureInRadioProcedure Coverage issues UL RSSI RRC connection pmRrcConnEstabAtt (pmRrcConnEstabAttDta , pmRrcConnEstabAttEm pmRrcConnEstabAttHpa , pmRrcConnEstabAttMod pmRrcConnEstabAttMos , pmRrcConnEstabAttMta) pmRrcConnEstabAttReatt (pmRrcConnEstabAttReattDta , pmRrcConnEstabAttReattEm pmRrcConnEstabAttReattHpa , pmRrcConnEstabAttReattMod pmRrcConnEstabAttReattMos , pmRrcConnEstabAttReattMta) pmRrcConnEstabSucc (pmRrcConnEstabSuccDta , pmRrcConnEstabSuccEm pmRrcConnEstabSuccHpa , pmRrcConnEstabSuccMod pmRrcConnEstabSuccMos , pmRrcConnEstabSuccMta) pmRrcConnReestFailLicMtReest pmRadioRecInterferencePwr pmRadioRecInterferencePwrPucch pmRadioRecInterferencePwrPrb1~100 pmSinrPucchDistr , pmSinrPuschDistr pZeroNominalPucch pZeroNominalPusch pmRrcConnEstabFailUnspecified noOfPucchCqiUsers , noOfPucchSrUsers , pdcchCfiMode tInactivityTimer , qRxLevMin , dlMaxRetxThreshold ulMaxRetxThreshold , qOffsetcellEUtran SchedulingAlgorithm , crsGain pmPrbUtilDl pmPrbUtilUl pmRrcConnEstabFailMmeOvlMos pmRrcConnEstabFailMmeOvlMod Cell Down Auto eNodeB Cause pmCellDowntimeAuto pmCellDownLockAuto Cell Down Manually Availability Other checks Sleeping Cell Alarms TN issue Check Eutrancelltdd MO cell selection and reselection parameters & 3G&2G cell reselection parameter/feature Check Cell Barred , acBarring for different scenarios Check MME signalling dimensioning Check S1 interface , S1 links down due to faulty interface board Configure Correct TAC as per planning & ensure correct TAC LAC Mapping Cell trace and check with Core Engineer dlNonGbrRatio , dlTransNwBandwidth Tune Dynamic GBR Admission Control related parameter pmErabEstabFailGbrUlEnb ulNonGbrRatio , ulTransNwBandwidth Tune Dynamic GBR Admission Control related parameter pmErabEstabFailAddedLic pmErabEstabFailInitLic pmErabModFailLic Coverage issues UL RSSI Check license & Feature state of Multiple Radio Bearer per user or RLC UM Check license & Feature state of Multiple Radio Bearer per user or RLC UM Lack of license of Dynamic QoS Modification pmRadioUeRepCqiDistr pmRadioUeRepCqiDistr2 maximumTransmissionPower partOfSectorPower confOutputPower crsGain pdschTypeBGain Tune related parameters (as mentioned beside) , Audit cell reselection parameters Physical optimization (Tilt , Azimuth , height of antenna) Identify overshooting cells causing interference in DL pmBadCovEvalReport pmRadioTbsPwrRestricted pmBadCovSearchEvalReport maximumTransmissionPower partOfSectorPower confOutputPower crsGain pdschTypeBGain Indoor coverage issue (Small cell , PICO , DOT , Hetnet) Physical changes (Tilt , Azimuth , height of antenna) Audit cell reselection parameters & Tune DL power related parameters (as mentioned beside) also Check if there is scope of new site Poor DL SINR (CQI) ERAB ESTABLISHMENT Check SectorEquipmentFunction:ConfiguredOutputPower & Eutrancelltdd:partOfSectorPower Idle mode parameter issue pmErabEstabFailGbrDlEnb License PmErabEstabAttInit (pmErabEstabAttInitArp , pmErabEstabAttInitPa) PmErabEstabSuccInit. (pmErabEstabSuccInitArp , pmErabEstabSuccInitPa) PmErabEstabAttAdded (pmErabEstabAttAddedArp , pmErabEstabAttAddedPa) PmErabEstabSuccAdded (pmErabEstabSuccAddedArp , pmErabEstabSuccAddedPa) pmErabEstabAttAddedHoOngoing pmErabEstabAttAddedHoOngoingArp Power setting issue Cell Barred TAC wrong configure & LAC-TAC mapping CN abnormal release PM Counter Radio Cause Operation Cause Faulty TMA Connections & faulty settings pmS1SigConnEstabFailMmeOvlMos Other Checks pmRadioRecInterferencePwr pmRadioRecInterferencePwrPucch pmRadioRecInterferencePwrPrb1~100 pmSinrPucchDistr , pmSinrPuschDistr pZeroNominalPucch pZeroNominalPusch Check Power control parameters Features like IRC & UL FSS can help to reduce UL interference. Check for Loose Connectors,Faulty Antenna(Tx & Rx antenna ports),VSWR alarms,Faulty TMA Connections/settings. External interference (cable tv , repeaters (due to power leak issues) , airport , police communication system etc..) Configuration issues Cell Down Auto Cell down pmCellDowntimeAuto pmCellDownLockAuto eNodeB Cause Cell Down Manually Availability HW Cause Sleeping Cell pmCellDowntimeMan pmCellDownLockMan S1 issues Operation Cause trace from MSG1 to MSG5 , verify symtoms for sleeping cells Power setting issue Check SectorEquipmentFunction:ConfiguredOutputPower & Eutrancelltdd:partOfSectorPower Idle mode parameter issue Cell Barred check for alarms like Service Unavailable(S1 connection failure) manually locked during network configuration issues ((eg. adding/changing/removing hardware) manually locked during parameter change (eg. activate feature) Catch Trace(Baseband) Configuration issue Baseband Trace can be used , te enable all bbmcBbOmMeSwU pmErabRelAbnormalEnbActTnFail check for alarms like Service Unavailable(S1 connection failure) , Ip packet loss "above" SGW Verify symtoms for sleeping cell Operation issues VSWR ensure proper configuration , especially for all new site which are integrated recently Ensure the eNodeB structure of the restart, MP、Baseband or RRU lh all llog -l (do complete eNB health checkup) pmRaAttCbra pmRaSuccCbra pmRaFailCbraMsg2Disc pmRaAttCfra pmRaSuccCfra pmRaFailCfraMsg2Disc pmRaAllocCfra pmRrcConnEstabAtt pmRrcConnSucc Non-access issue Alarms Auto Restart Baseband Startup issue Transport Cause EPC Cause Other checks check for alarms like Service Unavailable(S1 connection failure) manually locked during network configuration issues ((eg. adding/changing/removing hardware) manually locked during parameter change (eg. activate feature) CABX , verify VSWR on all ports of antenna TMA check S1 SIGNALLING CONNECTION Baseband Trace can be used , te enable all bbmcBbOmMeSwU pmErabRelAbnormalEnbActTnFail Common alarm : "resource configuration disable" , RRU fault , link failure , Check current & history alarms & take necessary action according to type of Alarm Check RRU status , Reset boards , Verify SW on node S1 links down due to faulty interface board. HW Cause VSWR S1 issues check for alarms like Service Unavailable(S1 connection failure) , Ip packet loss "above" SGW trace from MSG1 to MSG5 , verify symtoms for sleeping cells Operation issues PmS1SigConnEstabAtt (pmS1SigConnEstabAttHpa , pmS1SigConnEstabAttMod pmS1SigConnEstabAttMta , pmS1SigConnEstabAttMos pmS1SigConnEstabAttDta , pmS1SigConnEstabAttEm) PmS1SigConnEstabSucc (pmS1SigConnEstabSuccEm , pmS1SigConnEstabSuccHpa pmS1SigConnEstabSuccMod , pmS1SigConnEstabSuccMta pmS1SigConnEstabSuccMos , pmS1SigConnEstabSuccDta) ensure proper configuration , especially for all new site which are integrated recently Verify symptoms for sleeping cell Configuration issue Non-access issue Action Plan SRB admission control Tune parameters mentioned aside Physical changes (Tilt , Azimuth , height of antenna) Tune cell reselection parameters Ensure the eNodeB structure of the restart, MP、Baseband or RRU lh all llog -l (do complete eNB health checkup) Baseband Startup issue pmCellDowntimeMan pmCellDownLockMan pmRaAttCbra pmRaSuccCbra pmRaFailCbraMsg2Disc pmRaAttCfra pmRaSuccCfra pmRaFailCfraMsg2Disc pmRaAllocCfra pmRrcConnEstabAtt pmRrcConnSucc Trace(Baseband) SSSR (Session setup sucess rate) Counter Auto Restart Transport Cause EPC Cause Parameters Tune parameters mentioned aside Physical changes (Tilt , Azimuth , height of antenna) Tune cell reselection parameters to offload traffic to nearby cells Check parameters related to MME Overload Control feature & MME Dimensioning Cell down Legend Check Power control parameters Features like IRC & UL FSS can help to reduce UL interference. Check for Loose Connectors,Faulty Antenna(Tx & Rx antenna ports),VSWR alarms,Faulty TMA Connections/settings. External interference (cable tv , repeaters (due to power leak issues) , airport , police communication system etc..) pdcchAdmThreshold , noOfPucchCqiUsers , noOfPucchSrUsers pdcchCfiMode , tInactivityTimer , qRxLevMin dlMaxRetxThreshold , ulMaxRetxThreshold qOffsetcellEUtran , SchedulingAlgorithm , crsGain PmPdcchCceUtil Configuration issues LTE KPI Indoor coverage issue (Small cell , PICO , DOT , Hetnet) Physical changes (Tilt , Azimuth , height of antenna) Audit cell reselection parameters & Tune DL power related parameters (as mentioned beside) also Check if there is scope of new site If there are more then 1 carrier optimize load balancing parameter Optimize tilt/azimuth/antenna height to balance traffic from near by sites check for alarms or other hardware issues Low number of attempt Accessability Tune related parameters (as mentioned beside) , Physical optimization (Tilt , Azimuth , height of antenna Identify overshooting cells causing interference in DL , Audit cell reselection parameters Mainly pegged due to eNB issues pmRrcConnEstabFailBearerAdmissionRej (SRB admission control) MME overload maximumTransmissionPower partOfSectorPower confOutputPower crsGain pdschTypeBGain Upgrade license for number of connected users Physical changes (Tilt , Azimuth , height of antenna) Tune parameters as mentioned beside. pegged due to lack of license of feature Multi-Target RRC Connection Reestablishment pmRrcConnEstabFailLackOfResources Other Causes maximumTransmissionPower partOfSectorPower confOutputPower crsGain pdschTypeBGain Tune parameters as mentioned beside. Physical changes (Tilt , Azimuth , height of antenna) Reduce size of TA , reduces no. of cells being paged so reduces the CPU load in the MP. MP capacity of DUS is higher than DUL , to increase MP capacity DUL can be replaced by DUS Reduce no. of HO by physical opti or features (UE Level Oscillating Handover Minimization & Automated Mobility Optimization Tune cell reselection parameters to offload traffic to nearby cells Tune parameters mentioned aside Physical changes (Tilt , Azimuth , height of antenna) Tune cell reselection parameters to offload traffic to nearby cells noOfPucchCqiUsers , noOfPucchSrUsers , pdcchCfiMode tInactivityTimer , dlMaxRetxThreshold , ulMaxRetxThreshold qOffsetcellEUtran , qRxLevMin , SchedulingAlgorithm , crsGain pmRadioUeRepCqiDistr , pmRadioUeRepCqiDistr2 pmBadCovEvalReport pmRadioTbsPwrRestricted pmBadCovSearchEvalReport noOfPucchCqiUsers , noOfPucchSrUsers , pdcchCfiMode tInactivityTimer , dlMaxRetxThreshold , ulMaxRetxThreshold qOffsetcellEUtran , qRxLevMin , SchedulingAlgorithm , crsGain tPollRetransmitUl (DRB & SRB) , tPollRetransmitDl (DRB & SRB) numInitialAccessAndIncomingHo (system constant) , SpdcchLaGinrMargin (system constant) ulInterferenceForgettingFactor (system constant) , deltaPsdRs2Tx (system constant ) noOfPucchCqiUsers , noOfPucchSrUsers , pdcchCfiMode tInactivityTimer , dlMaxRetxThreshold , ulMaxRetxThreshold qOffsetcellEUtran , qRxLevMin , SchedulingAlgorithm , crsGain pmLicConnectedUsersLicense , pmLicConnectedUsersTimeCong pmLicConnectedUsersHardLimit , pmLicConnectedUsersActual pmLicConnectedUsersDistr pmRrcConnEstabFailLic Radio Cause pmRrcConnMax , pmRrcConnLevSum pmProcessorCoreLoad , pmProcessorLoad pmProcessorLoadDistr Check Eutrancelltdd MO cell selection and reselection parameters & 3G&2G cell reselection parameter/feature Check Cell Barred , acBarring for different scenarios Common alarm : "resource configuration disable" , RRU fault , link failure , Check current & history alarms & take necessary action according to type of Alarm Check RRU status , Reset boards , Verify SW on node S1 links down due to faulty interface board. CABX , verify VSWR on all ports of antenna TMA check Faulty TMA Connections & faulty settings EGI-Network Engineering- LRAN